html {
    height: 100%;
}

body {
    width: 100%;
    height: 100%;
    margin: auto;
    display: flex;
}

#bottom {
    display: none;
}

#top {
    height: 100%;
    flex-direction: row;
    flex: 1;
    text-align: center;
    background-color: rgb(22, 27, 34);
    display: flex;
    flex-direction: column;
    z-index: 999999;
}

#top .img {
    flex-direction: column;
    flex: 3;
}

#top div img {
    margin: 20px 0;
    width: 150px;
    border-radius: 50%;
    box-shadow: 0 0 3px rgb(226, 226, 226);
    pointer-events: none;
}

#top span {
    color: #fff;
    font-size: 40px;
    font-family: "钉钉进步体";
    flex-direction: column;
    flex: 1;
}

#top_bottom {
    height: 50%;
    flex-direction: column;
    flex: 6;
}

#top_menu {
    height: 100%;
    padding: 0 25px;
    list-style: none;
    display: flex;
    flex-direction: column;
}

#top_menu li:nth-child(1) {
    margin-top: 80px;
}

#top_menu li:nth-child(4) {
    margin-bottom: 80px;
}

#top_menu li {
    flex: 1;
    display: flex;
    flex-direction: row;
}

#top_menu svg, #top_menu p {
    flex: 1;
}

#top_menu svg {
    transform: scale(1.5);
}

#top_menu p {
    font-size: 25px;
    line-height: 25px;
    color: rgb(191, 191, 191);
    font-family: "钉钉进步体";
}

#body1, #body2, #body3, #body4 {
    height: 100%;
    flex-direction: row;
    flex: 4;
    background-color: rgb(13, 17, 23);
}

#body2, #body3, #body4 {
    display: none;
}

.Java, .MySQL {
    padding: 0 40px;
}

.Java:active, .MySQL:active {
    background-color: rgb(49, 50, 52);
}

.Java p, .MySQL p {
    display: inline-block;
    font-size: 20px;
    line-height: 53px;
    font-family: "钉钉进步体";
    color: #fff;
    flex: 20;
    user-select: none;
}

#Java_menu, #MySQL_menu {
    display: none;
}

#Java_menu ul, #MySQL_menu ul {
    height: 450px;
    overflow: auto;
    list-style: none;
    font-family: "钉钉进步体";
}


#Java_menu ul li, #MySQL_menu ul li {
    float: left;
    padding-left: 60px;
    height: 200px;
    width: 300px;
    display: flex;
    flex-direction: column;
}

#Java_menu ul li div, #MySQL_menu ul li div {
    color: #fff;
    font-size: 25px;
    text-align: center;
}

#Java_menu ul li img, #MySQL_menu ul li img {
    flex: 5;
}

#Java_menu ul li div, #MySQL_menu ul li div {
    flex: 1;
}

#MySQL4_menu {
    list-style: none;
    display: none;
    padding: 0 80px;
    font-family: "钉钉进步体";
}

#MySQL4_menu li {
    height: 40px;
    font-size: 20px;
}

#MySQL4_menu li a {
    text-decoration: none;
    color: rgb(141, 141, 141);
}

#MySQL4_menu li a:hover {
    color: rgb(159, 232, 174);
}